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diketahui perbandingan sisi jajar genjang 3 : 2
jadi,
a x t =150
2a x 3a =150
=150
=25
a=5
2a x 3a = 150
2(5) x (3(5) = 150
10 x 15 =150
berarti panjang alas 3(5) = 15